Samples and Population

To learn about teenagers' opinions of different social media platforms, a survey was given to students of one high school. This sample is...

• representative

• biased

• random

An employer wants to know how their 500 employees like working for them. Which is the most representative sample?

• Ask the first 75 people to show up for work

• Randomly select the names of 10 employees

• Poll the Employees of the Month for the past year

• Randomly select the names of 75 employees

To find out what sort of events they should plan, the student government officers at Truth send a survey to 30 students whose names were randomly selected. The population they are interested in is...

• The 30 students who were sent the survey

• Only the students who respond to the survey

• All students at Truth

• All middle school students in DC

To find out what sort of events they should plan, the student government officers at Truth send a survey to 30 students whose names were randomly selected. The sample is...

• The 30 students who were sent the survey

• All students at Truth

• The student government officers

Which is an example of a random sample?

• Polling the first 10 people who enter a room

• Asking a survey question to people who call in

• Drawing 10 names from a hat

Why should samples be randomly selected?

• for control

• to reduce bias

• so we don't get the same answers from everyone

A survey is being conducted to determine if a cable company should add another sports channel to their schedule. Which random survey would be the least biased?

• surveying 30 men at a gym

• surveying 45 people at a mall

• surveying 50 fans at a football game

• surveying 20 members of a high school soccer team

Erica is conducting a survey about the proposed increase in the sports budget in the Hometown School District. Which survey method would likely contain the most bias?

• Erica asks every third person entering the Hometown Grocery Store

• Erica asks every third person leaving the Hometown Shopping Mall this weekend.

• Erica asks every fifth student entering Hometown High School on Monday morning.

• Erica asks every fifth person leaving Saturday’s Hometown High School football game.

1.  Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

• Biased
• Unbiased

A mayor wanted to see if the people in his town thought he was doing a good job. Which choice best represents a sample?

• 1,000 unemployed voters.

• The mayor's family.

• The residents of the town.

• 242 voters.